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How to Repair Yamaha Generators

Yamaha Motor Corporation manufactures, in addition to its recreational vehicles and outboard motors, a line of industrial and commercial generators. In fact, in 2011 alone, Yamaha offered almost 20 different generator models on its website. Ranging from 1,000 to 12,000 watts, engineering differences exist between different models and years. Despite this, minor repair tips remain consistent across all models, and Yamaha offers similar troubleshooting advice in all generator owners manuals to help owners handle minor repairs outside of the shop.

Instructions

Quick Fixes

1

Check the engine stop switch, located on the far left side of the generators front control box, if the engine stalls, misfires, or wont start. If it is set to off, turn it on. Otherwise, the engine cannot start.

2

Read the fuel gauge located on the top of the generator. If the fuel tank is empty, ill with unleaded gasoline and restart the motor.

3

Check the engine oil levels in the oil tank, located on the front of the generator underneath the control box. Unscrew the filler cap and peer inside. Engine oil levels should reach the upper level of the oil filler hole. If not, ill with oil until this level. The recommended oil for a specific generator is listed in the "Engine Oil" section of the owners manual.

4

Tighten the cylinder head nuts, located on the front of the generators engine, using a standard wrench.

5

Operate the recoil starter. If the engine still stalls or wont start, move on to the next section.

Spark Plugs

6

Use the recoil starter. If the engine does not even turn over, there may be something wrong with the spark plugs.

7

Remove the spark plug or plugs, located in each of the generators cylinders on the front of its engine. Do this by removing the spark plug cap and rotating each spark plug counterclockwise with a spark plug wrench until it can be lifted from the cylinder.

8

Inspect the condition of the electrode end of the plug. If it appears brittle, cracked or burnt, the spark plug should be replaced with the kind of spark plug recommended in the owners manual. The type and number of plugs varies according to model and year.

9

Measure the spark plug gap for each plug, which is the measurement of the gap between the hook at the end of the spark plug. Spark plug gap should measure the amount recommended in the "Spark Plug" section of the owners manual, which also varies according to generator model. If the gap is too wide, shorten it by pressing this hook end against a hard surface. If it is too thin, widen it using a plug gap tool to gently pull the hook end wider.

10

Reinstall the spark plug or plugs by turning them clockwise into their respective cylinder holes with a spark plug wrench and returning the plug caps.

11

Try the recoil starter once more. If the engine still wont turn over, take the generator to a Yamaha dealer for inspection.

Fuel and Fuel Cock

12

Open the fuel tank and inspect the condition of the fuel in the tank if the engine turns over but wont start or if it stalls. If the gasoline is watery or gummy, it may be contaminated. Have a Yamaha dealer or mechanic drain the gas tank and ill it with fresh unleaded gasoline.

13

Turn off both the engine and the fuel cock lever to check the fuel cock. This lever is located on the right side of the generator.

14

Unscrew and remove the fuel cock cup and gasket, also located on the right side of the generator, using a standard wrench.

15

Inspect the inside of the fuel cock cup. If it contains build-up or debris, clean it out with solvent and wipe clean with a rag.

16

Replace the gasket if it is damaged.

17

Reinstall the fuel cock cap and gasket with a wrench.

18

Use the recoil starter. If the engine continues to run improperly, take the generator to a dealer for inspection.

Posted by Unknown at 12:00 PM

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Labels: generators, how, repair, to, yamaha